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feature: accessible difference data with callback #22

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utkuakyuz merged 4 commits into main from feature/accessible-diff-objects
Sep 16, 2025

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@utkuakyuz utkuakyuz commented Sep 16, 2025

Also this commit enables passing custom differ in case of need

And now exporting type DiffResult and Differ class

Also this commit enables passing custom differ in case of need
And now exporting type DiffResult and Differ class
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@utkuakyuz utkuakyuz self-assigned this Sep 16, 2025
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Summary of Changes

Hello @utkuakyuz, I'm Gemini Code Assist1 ! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the extensibility and control over the diffing process within the VirtualizedDiffViewer component. It provides a new mechanism for consumers to access the underlying diff data and allows for the injection of custom diffing algorithms. These changes empower developers to tailor the diff viewing experience to their specific needs and integrate more deeply with the diff results.

Highlights

  • Accessible Diff Data: Introduced a new getDiffData callback prop to the VirtualizedDiffViewer component, allowing external components to receive the raw diff results (left and right DiffResult[] arrays) whenever the diff data changes. This enables more advanced external processing or display of the diff information.
  • Custom Differ Support: Added a customDiffer prop to VirtualizedDiffViewerProps, enabling users to provide their own instance of the Differ class. This offers greater flexibility by allowing custom diffing logic to be injected into the viewer.
  • Exported Types and Classes: The Differ class and DiffResult type from json-diff-kit are now exported from the main library entry point. This makes them easily accessible for consumers who wish to implement custom diffing or work with the getDiffData callback.
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Code Review

This pull request introduces a new feature to access the raw difference data via a getDiffData callback and allows for passing a custom differ instance. This enhances the flexibility of the component. The implementation is mostly solid, using a ref to handle the callback and memoization to control updates. However, I've found a critical issue in the new fastHash function used to detect changes in the diff data. The current hashing logic can lead to collisions and prevent the callback from firing when it should. I've provided a suggestion for a more robust hashing algorithm. The other changes, like exporting Differ and DiffResult, are great additions for library consumers.

@utkuakyuz utkuakyuz merged commit bd0ec0b into main Sep 16, 2025
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resolves #21

Version 1.0.13 published

@utkuakyuz utkuakyuz deleted the feature/accessible-diff-objects branch September 16, 2025 11:34
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